Comprehensive Microstructural Evaluation of Precipitation in Inconel 718

被引：11
|
作者：
Sindhura, Davuluri [1 ]
Sravya, Mantha Venkata [1 ]
Murthy, G. V. S. [1 ]
机构：
[1] CSIR Natl Met Lab, Adv Mat & Proc Div, Jamshedpur 831007, Bihar, India
来源：
METALLOGRAPHY MICROSTRUCTURE AND ANALYSIS | 2019年 / 8卷 / 02期
关键词：
Inconel; 718; Aging; Ultrasonic velocity; Elastic constants; Mechanical properties; ULTRASONIC VELOCITY; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; SUPERALLOY;
D O I：
10.1007/s13632-018-00513-0
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Recent advances in industries require materials with greater strength at higher temperatures without failure in service. Inconel 718 is a precipitation strengthened Nickel-iron-based superalloy for application at high temperatures. In view of this, the present study is aimed at monitoring the degradation during service due to microstructural changes. Inconel 718 alloy is solution annealed at 980 degrees C for 1h, then subjected to aging treatment at different temperatures 650, 750, 800, 900 degrees C for times up to 100h. On solution treatment, there was a decline in strength, but after aging process, there is an enhancement of strength. The heat treatments and respective microstructural phases, which in turn influence both ultrasonic velocities and elastic properties, have been studied. Further, by ultrasonic measurements the precipitation behavior in Inconel 718 can be monitored in nondestructive manner.
引用
收藏
页码：233 / 240
页数：8
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